In Context

9 Then Joab seeing that the battle was prepared against him, both before and behind, chose of all the choice men of Israel, and put them in array against the Syrians:

10 And the rest of the people he delivered to Abisai his brother, who set them in array against the children of Ammon.

11 And Joab said: If the Syrians are too strong for me, then thou shalt help me: but if the children of Ammon are too strong for thee, then I will help thee.

12 Be of good courage, and let us fight for our people, and for the city of our God: and the Lord will do what is good in his sight.

13 And Joab and the people that were with him, began to fight against the Syrians: and they immediately fled before him.

14 And the children of Ammon seeing that the Syrians were fled, they fled also before Abisai, and entered into the city: and Joab returned from the children of Ammon, and came to Jerusalem.

2 Samuel 10:12 in Other Translations